placeholder vs variable

variable vs placeholder

placeholder and variable both are nouns.

placeholder is not an adjective while variable is an adjective.

Word	Noun	Adjective	Verb	Adverb
placeholder	Yes	No	No	No
variable	Yes	Yes	No	No

As nouns, variable is a hypernym of placeholder; that is, variable is a word with a broader meaning than placeholder:

placeholder: a symbol in a logical or mathematical expression that can be replaced by the name of any member of specified set
variable: a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity

placeholder (noun)	variable (noun)
a symbol in a logical or mathematical expression that can be replaced by the name of any member of specified set	a quantity that can assume any of a set of values
a person authorized to act for another	a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity
	something that is likely to vary; something that is subject to variation
	a star that varies noticeably in brightness

placeholder (adjective)	variable (adjective)
	liable to or capable of change
	(used of a device) designed so that a property (as e.g. light) can be varied
	marked by diversity or difference

Difference between placeholder and variable

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